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Author Topic: Arduino GPRS shield caught fire  (Read 8562 times)
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Sofia, Bulgaria
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As there are no recent posts on this interesting theme, I have to say that the GSM shield  recently bought, has a zener diode soldered in parallel to the problematic capacitor. So, I think this kinda solve the problem.
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Would love to see a pic from this new board. Any Specs to the diode?

Best regards
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Hi,

sorry for this late response.
Here https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcRsx7i6S0QzynAEEK6EIvl_opmtTw4mfAHcTQHte_XGUloDbfUdVQ you could find a photo of this zener diode soldered in parallel of the tantalum cap.
Tonight, when I get back home, I will check again what was the exact number of the diode and will post here it's data sheet.

Regards,

Erik
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Hi again!

I am looking now at my GSM shield.
Just to make clear something, this is not a new board, I mean generally. There is just this zener diode added to overcome this design flaw.
Here http://www.futurlec.com/Diodes/1N5338B.shtml, you can check its characteristics.
The diode is 1N5338b.

Regards,

Erik
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Ahh, this info helps a lot. Would you mind to take a pic from your shield? The pic you posted is so small.

Best regards
toonlumberjack
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Sure,

an image is attached.  smiley

Regards,

Erik


* GSM-shield.jpg (2451.81 KB, 3264x2448 - viewed 87 times.)
« Last Edit: March 24, 2014, 02:21:02 pm by ErikDimitrov » Logged

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